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%D \module
%D [ file=font-mat,
%D version=2011.01.13, % (copied fron font-ini)
%D title=\CONTEXT\ Font Macros,
%D subtitle=Symbolic Access,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Font Macros / Symbolic Access}
\unprotect
%D \macros
%D {getglyph, symbolicfont}
%D
%D Individual glyphs can be accessed by using
%D
%D \starttyping
%D \getglyph{fontname}{character}
%D \stoptyping
%D
%D This macro is used in for instance the symbol modules and
%D as one can see, it does obey the small and even smaller
%D sizes. The \type {\symbolicfont} macro can be used to
%D switch to a font named \type {fontname} (see \type
%D {cont-log} and \type {symb-eur} for examples of symbolic
%D definitions.
\def\v_font_string_a
{\ifx\fontstyle\s!rm \s!Serif \else
\ifx\fontstyle\s!ss \s!Sans \else
\ifx\fontstyle\s!tt \s!Mono \else
\s!Serif \fi\fi\fi}
\def\v_font_string_b
{\ifx\fontstyle\s!rm \s!Regular \else
\ifx\fontstyle\s!ss \s!Support \else
\ifx\fontstyle\s!tt \s!Type \else
\s!Serif \fi\fi\fi}
\def\v_font_string_c
{\ifx\fontalternative\s!bf \s!Bold \else
\ifx\fontalternative\s!sl \s!Slanted \else
\ifx\fontalternative\s!it \s!Italic \else
\ifx\fontalternative\s!bs \s!BoldSlanted \else
\ifx\fontalternative\s!bi \s!BoldItalic \fi\fi\fi\fi\fi}
\let\v_font_string_d\s!Serif % default fontstyle (will be redefined in type-ini)
\definefontsynonym
[CurrentFont]
[\noexpand\v_font_string_a\noexpand\v_font_string_c]
% potential generalization:
%
% \letvalue{\??fontfile:t:\s!rm}\s!Serif
% \letvalue{\??fontfile:t:\s!ss}\s!Sans
% \letvalue{\??fontfile:t:\s!tt}\s!Mono
%
% \letvalue{\??fontfile:a:\s!rm}\s!Regular
% \letvalue{\??fontfile:a:\s!ss}\s!Support
% \letvalue{\??fontfile:a:\s!tt}\s!Type
%
% \letvalue{\??fontfile:s:\s!bf}\s!Bold
% \letvalue{\??fontfile:s:\s!sl}\s!Slanted
% \letvalue{\??fontfile:s:\s!it}\s!Italic
% \letvalue{\??fontfile:s:\s!bs}\s!BoldSlanted
% \letvalue{\??fontfile:s:\s!bi}\s!BoldItalic
%
% \def\v_font_string_a{\executeifdefined{\??fontfile:t:\fontstyle}\s!Serif}
% \def\v_font_string_a{\executeifdefined{\??fontfile:t:\fontstyle}\s!Serif}
% \def\v_font_string_b{\executeifdefined{\??fontfile:a:\fontstyle}\s!Serif}
% \def\v_font_string_c{\executeifdefined{\??fontfile:s:\fontstyle}\empty}
% \def\v_font_string_d{\executeifdefined{\??fontfile:t:\csname\??typescriptdefaultstyles\fontclass\endcsname}\s!Serif}
%D \macros
%D {fontstylesuffix}
%D
%D The next macro is used to map non latin fontnames on fonts. See \type
%D {font-uni} for an example of its use.
\def\fontstylesuffix% why the \s!Regular ? see \getglyph
{\ifx\fontalternative\s!tf \s!Regular \else
\ifx\fontalternative\s!bf \s!Bold \else
\ifx\fontalternative\s!sl \s!Slanted \else
\ifx\fontalternative\s!it \s!Italic \else
\ifx\fontalternative\s!bs \s!BoldSlanted \else
\ifx\fontalternative\s!bi \s!BoldItalic \else
\ifx\fontalternative\s!sc \s!Caps \else
\s!Regular \fi\fi\fi\fi\fi\fi\fi}%
\def\glyphfontfile#base% appends
{#base%
\ifcsname\??fontfile#base\v_font_string_a\v_font_string_c\endcsname
\v_font_string_a\v_font_string_c
\else\ifcsname\??fontfile#base\v_font_string_b\v_font_string_c\endcsname
\v_font_string_b\v_font_string_c
\else\ifcsname\??fontfile#base\v_font_string_a\endcsname
\v_font_string_a
\else\ifcsname\??fontfile#base\v_font_string_b\endcsname
\v_font_string_b
\else\ifcsname\??fontfile#base\v_font_string_c\endcsname
\v_font_string_c
\fi\fi\fi\fi\fi}
%D The next macro can be used to make decisions based on the shape:
\def\doifelseitalic#yes#nop%
{\ifx\fontalternative\s!sl#yes\else
\ifx\fontalternative\s!it#yes\else
\ifx\fontalternative\s!bs#yes\else
\ifx\fontalternative\s!bi#yes\else#nop\fi\fi\fi\fi}
\let\doifitalicelse\doifelseitalic
%D For an example of usage of the following command,
%D see \type {cont-log.tex}.
%D
%D \starttyping
%D \def\symbolicfont#specification{\definedfont[\glyphfontfile{#specification} sa *]}
%D \stoptyping
%D
%D Since we know what scaling it to be applied, we can
%D implement a much faster alternative:
\installcorenamespace{symbolfont}
\let\thedefinedfont\relax
\def\setscaledstyledsymbolicfont#1#2#3% quite a slowdown, glyphfontfile
{\edef\askedsymbolfont{\truefontname{\glyphfontfile{#3}} at \the\dimexpr#2\dimexpr\currentfontbodyscale\dimexpr#1}%
\ifcsname\??symbolfont\askedsymbolfont\endcsname
\lastnamedcs
\else
\font_basics_define_symbolic_font
\fi}
\def\setscaleddirectsymbolicfont#1#2#3% quite a slowdown, glyphfontfile
{\edef\askedsymbolfont{\truefontname{#3} at \the\dimexpr#2\dimexpr\currentfontbodyscale\dimexpr#1}%
\ifcsname\??symbolfont\askedsymbolfont\endcsname
\lastnamedcs
\else
\font_basics_define_symbolic_font
\fi}
\def\setstyledsymbolicfont#fontname% quite a slowdown, glyphfontfile
{\edef\askedsymbolfont{\truefontname{\glyphfontfile{#fontname}} at \the\dimexpr\currentfontbodyscale\dimexpr\fontbody}%
\ifcsname\??symbolfont\askedsymbolfont\endcsname
\lastnamedcs
\else
\font_basics_define_symbolic_font
\fi}
\def\setdirectsymbolicfont#fontname%
{\edef\askedsymbolfont{\truefontname{#fontname} at \the\dimexpr\currentfontbodyscale\dimexpr\fontbody}%
\ifcsname\??symbolfont\askedsymbolfont\endcsname
\lastnamedcs
\else
\font_basics_define_symbolic_font
\fi}
\def\font_basics_define_symbolic_font
{\definefont[currentsymbolfont][\askedsymbolfont]%
\currentsymbolfont
\expandafter\glet\csname\??symbolfont\askedsymbolfont\endcsname\lastrawfontcall}
\unexpanded\def\getnamedglyphstyled#fontname#character{{\setstyledsymbolicfont{#fontname}\clf_fontchar{#character}}}
\unexpanded\def\getnamedglyphdirect#fontname#character{{\setdirectsymbolicfont{#fontname}\clf_fontchar{#character}}}
\unexpanded\def\getglyphstyled #fontname#character{{\setstyledsymbolicfont{#fontname}\doifelsenumber{#character}\char\donothing#character}}
\unexpanded\def\getglyphdirect #fontname#character{{\setdirectsymbolicfont{#fontname}\doifelsenumber{#character}\char\donothing#character}}
\unexpanded\def\resolvedglyphstyled#fontname#character{{\setstyledsymbolicfont{#fontname}\clf_tochar{#character}}}
\unexpanded\def\resolvedglyphdirect#fontname#character{{\setdirectsymbolicfont{#fontname}\clf_tochar{#character}}}
% this one is wrong:
\unexpanded\def\getscaledglyph#scale#name#content%
{{\setscaledstyledsymbolicfont\fontbody{#scale}{#name}\doifelsenumber{#content}\char\donothing#content}}
\let\getglyph \getglyphstyled % old
\let\getrawglyph \getglyphdirect % old
\let\symbolicsizedfont\setscaledstyledsymbolicfont % old
\let\symbolicfont \setstyledsymbolicfont % old
\unexpanded\def\symbolicscaledfont{\setsscaledstyledsymbolicfont\fontbody}
\unexpanded\def\symbolicscaledfont{\setscaledstyledsymbolicfont\fontbody}
%D The last implementation of \type {\getglyph} permits
%D definitions like:
%D
%D \starttyping
%D \definefontsynonym [EuroSans] [eurose]
%D \definefontsynonym [EuroSansBold] [euroseb]
%D \definefontsynonym [EuroSansItalic] [eurosei]
%D \definefontsynonym [EuroSansSlanted] [eurosei]
%D \definefontsynonym [EuroSansBoldItalic] [eurosebi]
%D \definefontsynonym [EuroSansBoldSlanted] [eurosebi]
%D
%D \definesymbol [euro] [\getglyph{Euro}{\char160}]
%D
%D \def\euro{\symbol[euro]}
%D \stoptyping
%D
%D These definitions guarantee that the next calls work okay:
%D
%D \starttyping
%D \ss \tf\euro \bf\euro \sla\euro \itd\euro \bs\euro \bic\euro
%D \stoptyping
%D
%D The shape as well as the size is adapted to the current
%D environment.
%D \macros
%D {setfont}
%D
%D Every now and then we want to define a font directly, for
%D instance when we typeset title pages. The next macro saves
%D some typing:
\unexpanded\def\setfont% geen \font_helpers_set_font mogelijk
{\afterassignment\font_basics_set_font\font\nextfont=}
\def\font_basics_set_font
{\nextfont\setupinterlinespace}% hm, we need to use \setuplocalinterlinespace
%D One can call this macro as:
%D
%D \starttyping
%D \setfont cmr10 at 60pt
%D \stoptyping
%D
%D After which the font is active and the baselines and
%D struts are set.
%D \macros{doiffontcharelse}
\unexpanded\def\doifelsefontchar#specification#unicode% this could be a direct lua call
{\begingroup
\font_basics_define_font_without_parameters{thedefinedfont}{#specification}%
\iffontchar\font#unicode\relax
\endgroup\expandafter\firstoftwoarguments
\else
\endgroup\expandafter\secondoftwoarguments
\fi}
\let\doiffontcharelse\doifelsefontchar
\protect \endinput
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